AN INDIVIDUAL-BASED BIOENERGETIC MODELOFRAINBOWTROUT (Onchorhynchus mykiss)

In Italy, there is a long tradition of rainbow trout (Oncorhynchus mykiss) farming, which requires high-quality and well- oxygenated water. However, this activity negatively affects quality of downstream water in terms of several parameters, e.g. BOD5, NH4 (Sidoruk, 2019). Royer et al. (2021) developed a novel approach for the implementation of the framework of Precision Fish Farming to efficiently control and predict short-term evolutions of concentration of dissolved oxygen in raceway and they highlighted the importance of having reliable tools concerning the temporal evolution of fish weight according to change in environmental and management conditions. In this work, a new dynamic bioenergetic individual model of rainbow trout is presented, which enables one to simulate the evolution of fish weight in relation to water temperature, feed ration and feed quality. Furthermore, the model allows the estimation of oxygen consumption and ammonia excretion rates, which can be used to develop a population individual-based model in order to simulate short-term evolution of concentration of dissolved oxygen and of ammonia.